"Joao Felix is one of the best talents to have emerged from the 1999 generation and has everything needed to become the most expensive transfer in Portuguese football and even a candidate for the Ballon d'Or," agent Pedro Cordeiro told Record.

In November, Portugal under-21 international Felix signed a new contract, which has a €120m release clause, until 2023.

"I'm in the best club in Portugal and one of the best in the world," he said at the time. "To be a part of the first team is a dream come true."